SATURDAY ABC: Olympic Trials (4-5 p.m.; Sunday, 9-11 p.m.) Track and field trials, mostly live from Los Angeles. MONDAY
HBO: Tennis From Wimbledon (5-8 p.m.) Taped early-round matches
PBS: Power and Prejudice in America (8-9 p.m.) A look at the current political movement of black Americans as a way to understand prejudice in the US today. TUESDAY
PBS: On the Line (10:30-11 p.m.) A chronological tale about the conversion of an old Chrysler auto plant from an aging facility to a state-of-the-art production plant. WEDNESDAY
PBS: What Do Children Think of When They Think of the Bomb (9-10:30 p.m.) Explores children's awareness of the threat of nuclear war and how it manifests itself in their games and relationships.